The other turtle's attention now fully shifting to him makes Donnie all at once uncertain again, if for all of two seconds. He starts to nod at the question before shaking his head to the second question.

With Leo now at his level, he stares unabashedly at the other turtle, eventually reaching a hand out to trace the red markings on his brother's face. Then he pokes a finger at his nose.

"Why're you so big?" Because it has to be Leo. How many other mutant red-ear sliders does he know? And clearly this big turtle knows who Donnie is.